The switching cabinet blower heater can be used vertically and horizontally and has an axial fan fitted with ball bearings 10 watts rate of air flow approx 40 m an hour the device is usually controlled with an external thermostat e g order no 18 58 88 hg vario has an overheat thermostat which that at 120 c fan failure interrupts the power particularly suited to switching stations outdoors in wind turbines automatic ticket machines etc clip on fastening on 35 mm din top h